[Objective]The symbol decomposition technique aims to decompose Optical Orthogonal Frequency Division Multiple-xing(O-OFDM)symbols into multiple symbols with a small Peak to Average Power Ratio(PAPR)to mitigate the non-linear effects of Light Emitting Diodes(LEDs).However,O-OFDM generates more decomposed symbols with a higher PAPR,thereby reducing the information rate and degrading the Bit Error Rate(BER)performance.[Methods]The proposed design of Precoding O-OFDM Adaptive Symbol Decomposition with Serial Transmission(PCO-OFDM-ASDST)system uses precoding scheme to reduce the PAPR of O-OFDM symbols.The proposed method can reduce the average number of symbol decomposi-tions for adaptive symbol decomposition.The theoretical Signal-to-Noise Ratio(SNR)expressions are derived for multipath channels,and the performance of PAPR,BER,and information rate is analyzed using Monte Carlo BER simulations.[Results]The results demonstrate that under 4 Quadrature Amplitude Modulation(QAM)modulation in Asymmetrically Clipped Opti-cal Orthogonal Frequency Division Multiplexing(ACO-OFDM)systems,the symbol power required for PCO-OFDM-ASDST is 7 dB less than that of Adaptive Symbol Decomposition with Serial Transmission(ASDST)when the BER is 10-4.Moreo-ver,under 64QAM,the information rate can be increased by 10 Mbit/s when the symbol power is 20 dBm.[Conclusion]The results indicate that the PCO-OFDM-ASDST outperforms ASDST systems in terms of BER and information transmission rate.
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